The standard molar enthalpy of formation of NH3 (g) is - 45.9 kJ/mol. What is the enthalpy change if 9.51 g N 2 (g) and 1.96 g H2 (g) react to produce NH

3 (8) ?

a.-29.8 kJ/mol-rxn

b.-43.7 kJ/mol-rxn

C.-10.3 kJ/mol-rxn

d.-20.7 kJ/mol-rxn

e. - 65.6 kJ/mol-rxn

Question

Chemistry

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17 August, 16:14

The standard molar enthalpy of formation of NH3 (g) is - 45.9 kJ/mol. What is the enthalpy change if 9.51 g N 2 (g) and 1.96 g H2 (g) react to produce NH

3 (8) ?

a.-29.8 kJ/mol-rxn

b.-43.7 kJ/mol-rxn

C.-10.3 kJ/mol-rxn

d.-20.7 kJ/mol-rxn

e. - 65.6 kJ/mol-rxn

+3

Answers (1)

Know the Answer?

Daniel Cowan · Answer 1

a. - 29.8 kJ/mol-rxn

Explanation:

For a chemical reaction system the forward and reverse rate are equal. The standard molar enthalpy formation of NH3 is - 45.9 kJ/mol. For the enthalpy of NH3 (8) the molar enthalpy is - 29.8kJ/mol. The molar mass of N2 = 28.02g/mol. Molar enthalpy of formation is standard amount of substance produced in the formation of a reaction. The molar enthalpy is the change in enthalpy due to reaction per mole.

The standard molar enthalpy of formation of NH3 (g) is - 45.9 kJ/mol. What is the enthalpy change if 9.51 g N 2 (g) and 1.96 g H2 (g) react to produce NH3 (8) ?a.-29.8 kJ/mol-rxnb.-43.7 kJ/mol-rxnC.-10.3 kJ/mol-rxnd.-20.7 kJ/mol-rxne. - 65.6 kJ/mol-rxn

The standard molar enthalpy of formation of NH3 (g) is - 45.9 kJ/mol. What is the enthalpy change if 9.51 g N 2 (g) and 1.96 g H2 (g) react to produce NH

3 (8) ?

a.-29.8 kJ/mol-rxn

b.-43.7 kJ/mol-rxn

C.-10.3 kJ/mol-rxn

d.-20.7 kJ/mol-rxn

e. - 65.6 kJ/mol-rxn